Solar energy, tidal energy, bio-mass and wind energy are examples of:
Commercial sources
Non-commercial sources
Conventional Sources
Non Conventional sources
These sources of energy are non-conventional sources of energy.
Give examples :
(a) Non-conventional sources of energy.
(b) Fuels.
(c) Hydroelectric power plant.
(d) Renewable source of energy.
(e) Never-ending source of energy.
(f) Machines that work on solar energy.